National Geographic™ Compact Submersible Aquarium Heater
I bought this heater from the store on April 26, 2014 and yesterday it stopped working. Luckily I had an extra heater from an old aquarium or all my guppies would have died. Don't buy this heater for your tank!
May 24, 2014
I got this heater a few weeks ago for my 2.5 gallon betta tank, and it only heated it to 74F. I tested it again in a spare one gallon tank, and it went to 80F. It doesn't heat up the full amount of space listed on the package. I'd find a better one if I were you.
May 6, 2014